Wrench



Nov. 1, 1927. 7 1,647,340

L. A. BURCH Y WRENCH Filed Dec. 5, 1925 Patented ov. 1 1927.

LAWRENCE A. BURCH, OF JAMESTQWN, NEW $103111.

wnnnon.

Application filed December 5, 1925. serial r10. 73,520. I

' This inventiona ims to provide a simple ceeds, the invention residesin the combina 15 tion and arrangement of parts andinthe details ofconstruction hereinafter described and claimed, it being understood thatchanges in the precise embodiment of the in vention herein disclosed,may be made within the scope of what is claimed, without departing fromthe spirit of'the invention.

In the drawings Figure 1 shows in side elevation, a wrench constructedin accordance with the invention; Figure 2 is a section on the line 22ofFigure 1; Figure 3 is a fragmentalelevation, wherein the opposite sideof the wrench from that disclosed in Figure l is exposed; Figure 4 is asection taken on the longitudinal section showing a modification; Figure7 is a section on the line 7-7 of Figure 6. p

The wrench forming the subject matter of this application compriseslevers 1 and 2, connected pivotally atone end, in any suitable way,torinstance, by means of a headed pivot element 3 carried by the lever 2and slidable in .an elongated slot 4: on the'lever 1. Thelevers 1 and 2are equipped wit-bacooperating jaws 5 having transverse oft-sets 6, theoff-sets 6 defining transverse grooves 7 in the inner surfaces of thelevers 1 and 2. The groove 7 of the lever 2 is threaded as at 8,throughout the major portion of its length, whereas the groove 7 in thelever 1 is smooth throughout the major portion of its length, as shownat 9, there being a transverse rib extending across the groove of thelever 1, and there being, in the groove of the lever 1, at the outer endof the said groove, a plurality of seats 11, which are V- shapedin'cross section, it being observed,

line 4t4; of Figure 3; Figure 5 is a section on the line 55 of Figure 8;Figure 6 1s :1

especially, that these seats are'not to be mistaken for threads. I j

Ameans is provided for holding the levers with the jaws 5 at adjusteddistances apart, I

and for adjusting the distance between the jaws, the aforesaid meansembodying-a screw, 12 received in the smooth portion 9 of the gro'oveinthelever 1,.and cooperatingwith the threads 8111 the grooveo'f the lever2, the screw havlng aflthreaded portion 14' v which cooperateswithjifthe threads .at 8.

The screw 12 has an annular circumscribing recess 15,'re'ceivin'g therib 10 onlthe. lever 1, the screw being supplied, outwardly'ofthe recess15, with ribs 16 (not threads) .which coactwith the seats 11 of thelever1,

and, together with theelements 10 and 15, serve tohold the screw12 forrotation, but against. longitudinal movement, the screw having ahead 17provided with ascrew driver kerf 18, it being possible to rotate thescrew and separate thejaWs 5, because'the threaded portion 1 1 of thescrew 12 cooper ates with the threaded part 8 of the lever 2. I

each other along a right line, represented by 'The jaws 5 move towardand away from l is provided with the slot): for the recep-f 7 tion ofthe pivot element 3. c

A means is provided for holding the levers against separhtion in a planeat'right angles.

to the plane in which the jaws 5, andior i clamping the screw 12 againstturning, the

aforesaid means embodying a bolt 19,mov-

able in transverse slots 20 formed in the levers 1' and 2, near to theoff-sets 6," thehead 21 of the bolt 19 beingengaged with I one of theoff-sets 6, as shown in Figure '3, to prevent the bolt from turning. Alever nut 23 is threaded on the bolt 19 and coopen. I

ates with the lever 1, the handle of the lever.

nut being co'ncaved, as at 2 1, so that it can be sprung over theoft-sets 6 on the jaw 1, tov

hold the lever nut against turning.

In Figures 6 and 7, parts hereinbefore described have been designated bynumerals previously used, with the suiiix a; The

modification consists in omitting the grooves 7 and the screw 12.Thevmeans for holding the levers 1 and 2 with the jaws 5 at adjusteddistances apart, consists in cooperat- .ing teeth or ribs 25 on theinner surfaces of.

the levers 1 and 2, the teethon the respective levers being adapted tobe interengaged, and the bolt 19 and the lever nut 23 cooperating tohold the teeth interengaged.

What is claimed is 1. A wrench comprising levers each having a jaw atone end, a bolt and nut connecting the jaws, one jaw having an elongatedslot wherein the bolt is received, both jaws having ofi-set-s, oneoff-set engaging the head 01": the bolt to hold the boltagain'st rotation, and the nut having a handle adapted to be sprung over the otheroff-set, and means for holding the levers with the jaws at adjusteddistances apart, said means embodying a screw held for rotation butagainst longitudinal movement in the ott-set of one and threaded intothe off-set or the other jaw.

2. A wrench comprising levers each having a jawat one end, a screw heldfor rot tion but against longitudinal movement in one lever, and havingthreaded connection with the other lever,,abolt and a nut constitutingmeans for binding the levers on the screw, thereby to hold the screwagainst rotation the levers having cooperating slots wherein the bolt isreceived, and means for movably connecting the levers at their oppositeends.

3. A wrench comprising levers each having a jaw at one end, means formovably connecting the levers at their other ends, and a screw providedwith a threaded portion and with aplurality of annular ribs located sideby side and at right angles to the axis of the screw, one lever having asmooth portion housing the threaded portion of the screw, and beingprovided with a plurality of annular ribs located side by side and atright angles to the axis of the screw, the ribs of the screw and of saidlever constituting means for holding the screw for rotation but againstlongitudinal. movement.

In testimony that I claim the foregoing as my own, I have hereto atlixedmy signature.

LAWRENCE A. BURCH.

